I did all the decal applications. pretty straightforward. Only tips I would say:
For hood decal, a little soapy water on the sticker and hood allows you to squeegee out any bubbles. Make sure there is no aloe or lotion in the soap...that will leave a film and your decal wont stick. For the very front of the grill, you will have wrinkles at first as a flat decal doesn't really follow the hood curves. Just heat the area with a hair dryer, while working out the creases, and it will come together nice and smooth. Took about 30 min.
For the letters, since they have all those little cutouts, they didn't stick to the application backing readily. Best thing to do there was put on a table inside house and slowly peel. If a sticker didn't adhere to the application backing, dab at it until it lifts off (like taking tape and dabbing dog hair off a couch). Eventually you will get everything off, then run outside and slap it on your truck. Assuming you cleaned the application area on the truck first.